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About Eyelight

Biography:

I've been playing with photography for roughly 45 years. Dabbled in B&W lab work, developing film and prints. The bulk of my creative/professional experience was in the late 70's thru mid 80's, so all in film. Worked as a studio photographer in portraiture for a while in the early ‘80s. I've used a plethora of film and digital cameras in the last 24 years doing the work I do, and have usually carried some form of camera during the waking hours both for work and anything else that moves or not.

My current profession is as a thermographer, so my living is gained from capturing images, but just in a different wavelength and for a different purpose.

Really never stopped doing creative photography, but it has been restrained for a number of years, so more or less trying to catch up. Always liked Nikons, so picked up a D3200 a few years ago, Nikonites caught my eye and seemed like a good place to learn what I don’t know and share what I do.

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These are charts depicting total DOF and the shift between the DOF in front of the focal point and the DOF in rear of the focal point. The calculations use the CoC (circle of confusion) of a DX sensor, though the trend appears similar for FX. Each chart uses a focus distance of 1 meter, the focal length listed above it and progresses thru the apertures

Magnification is achieved by a combination of focal length and focus distance.

Took a few days to come up with the right equations to use DOF equivalent focal length & focus distance combinations. Basically started with the DOF equations for a series of focal lengths. Then determined an increase in distance that would result in the